Hydronic System Flow Rate Control for Target Heat Delivery Management
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Solution Overview
Problem
Conventional hydronic systems face inefficiencies in managing the rate of heat delivery, leading to suboptimal energy usage and increased emissions due to reliance on fossil fuels and variable energy costs, necessitating advanced control systems to optimize heat transfer and energy management.
Innovation Solution
A control unit within the hydronic system that calculates the actual rate of heat delivery based on fluid flow rate and temperature differences between spatially separated points, adjusts the flow rate to maintain a target rate, and adapts pumping or flow modulation to ensure efficient heat transfer and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional hydronic systems use combustion of fossil fuels for heating fluid, then heating capability is achieved, but greenhouse gas emissions and air pollutants are generated
Solution Approach 1:
The system changes the energy source parameter from fossil fuel combustion to electric heat pumps or resistance heating, eliminating direct emissions while maintaining heating capability. The control system optimizes electrical parameters to match heat delivery requirements, reducing overall energy consumption and indirect emissions.
Solution Approach 2:
The patent replaces the mechanical combustion process with electrical heating mechanisms (heat pumps or resistance heaters). This substitution eliminates the combustion chamber, flue gases, and associated emission control systems, achieving zero direct emissions while providing equivalent or superior heating performance.
2Device complexity
If hydronic systems operate without rate of heat delivery management, then system simplicity is maintained, but energy efficiency and operational costs deteriorate
Solution Approach 1:
The control system continuously monitors actual heat delivery rate by measuring fluid flow rate and temperature differential, compares it to the target rate, and adjusts pump speed or valve positions accordingly. This closed-loop feedback mechanism optimizes energy efficiency while maintaining manageable system complexity through standard control components.
Solution Approach 2:
The system dynamically adjusts operational parameters (pump speed, flow rate, temperature setpoints) based on real-time conditions and heat delivery requirements. This dynamic optimization improves energy efficiency by matching system output to actual demand, preventing both over-heating and unnecessary pump operation.
3Loss of time
If hydronic systems use thermal storage with load shifting, then cost savings during peak pricing periods are achieved, but precise control of heat delivery rate becomes more difficult
Solution Approach 1:
The system pre-heats or pre-cools thermal storage tanks during off-peak periods when electricity rates are lower, preparing thermal energy in advance. The control system then manages the discharge of this stored thermal energy during peak periods, achieving cost savings while maintaining heat delivery control through coordinated pump and valve operation.
Solution Approach 2:
The control system performs multiple functions: it manages real-time heat delivery control, coordinates thermal storage charging and discharging, responds to time-varying electricity rates, and optimizes pump operation. This multi-functionality achieves both cost savings and acceptable control complexity by integrating these functions into a single intelligent control platform.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables precise management of heat delivery, enhancing energy efficiency, reducing emissions, and minimizing operational costs by optimizing fluid flow and pumping rates in response to temperature requirements.
Implementation Method 1
hydronic systems are typically thermo-fluid dynamic systems that use a fluid as heat-transfer medium for heating and cooling homes, commercial, and/or industrial spaces
Implementation Method 2
calculating an actual rate of heat delivery in the two spatially separated points based, at least in part, on flow rate and temperature difference of the fluid
Data Source
AI summary
The present disclosure provides a method for controlling rate of heat delivery in a hydronic system, which includes receiving, by a control unit, at least a first temperature, a second temperature from two spatially separated points in the hydronic system and a flow rate. The two spatially separated points correspond to inlet of heat transfer device and outlet of heat transfer device. The method also includes calculating at predefined interval, by the control unit, an actual rate of heat delivery to the heat transfer device based on flow rate and temperature difference between the two spatially separated points. The control unit determines heat delivery rate difference between actual rate of heat delivery and target rate of heat delivery. The control unit adapts flow rate of fluid into inlet of heat transfer device based on heat delivery rate difference to maintain target rate of heat delivery in heat transfer device.